Clamping-ring.



No. 848369. Y PATBNTED APR. 2. 1,907. J.GLARK. OLAMPING RING.APPLICATION FILED DEO.21,1906.-

' 2 SHEETS-SHEET 1.

III m INVENTOR UNITED STATES PATENT GFFTQEQ JAMES CLARK, OF BRADFORD,PENNSYLVANIA, ASSIGNOR TO S. R.

DRESSER MANUFACTURING COMPANY, OF BRADFORD, PENN SYL- VANIA.

CLAMPING-RING.

I No. 848,969.

Specification of Letters Patent.

Application filed December 21, 1906. Serial No. 348,913.

To all whom it may concern:

Be it known that I, JAMES CLARK, a citizen of the United States,residing at Bradford, in the county of McKean and State of Pennsylvania, have invented certain new and useful Improvements in Clamping-Rings;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention consists in the novel features hereinafter described,reference being had to the accompanying drawings, which illustrate oneform in which I have contemplated embodying my invention; and saidinvention is fully disclosed in the following description and claims.

The object of my invention is to form a clamping-ring for pipe-couplingsof wrought metal, such as wrought iron or steel, to produce a cheap,light, and strong device for this purpose.

In carrying out my invention I form a clamping-ring which consists of aplate mem ber disposed perpendicularly to the axis of the ring andprovided at intervals with boltholes, which are punched or struck fromthe same in such manner that the metal which is displaced is notentirely severed from the plate member, but is bent over upon one faceof the same and made to reinforce a flange member which is provided withan annular portion disposed substantially perpendicularly to the platemember and has portions at one end bent inwardly substantially parallelto and engaging the face of the said plate member, all as willhereinafter more fully apear. p In the drawings, Figure 1 is a sectionalview of a blank which can be advantageously employed for the productionof the plate member of my improved clamping-ring when the two membersthereof are formed separately, as herein shown. Fig. 2 is a sectionalview of said blank after the bolt-holes are formed therein, the metalfrom said boltholes being left integral with the plate member on theinner side to form reinforcing-lugs. Fig. 3 is a similar view showingthe reinforcing-lugs bent down into contact with the face of the platemember. Fig. 4 is a sectional view of the complete clamping-ring. Fig. 5

is a plan view of the same. Fig. 6 represents a sectional view of ablank which may be conveniently employed for making the clamping-ringsas an integral structure. Figs. 7, 8, and 9 represent sectional views ofthe blank in various stages in the production of the finished ring. Fig.10 represents the finished ring when made in one iece.

In Figs. 1 to 5, inclusive, of the drawings I have shown the platemember and flange member of my improved clamping-ring formed separately;but this is not essential. In Fig. 1 I have shown a blank which can beadvantageously used in forming the separate plate member and whichconsists of a flat plate A, of sheet metal, preferably wrought iron orsteel, whichmay be round orpolygonal, as desired, and is provided with acentral aperture a for the passage of a pipe therethrough. This blank ispreferably acted upon in any suitable manner to bend up its periphery orouter edge on one side to form a reinforcing-flange a; but this is notessential and may be dispensed with, if desired. The plate member A isalso provided at suitable intervals with bolt-holes a of any desiredsize or shape, those here shown being substantially oval, and in theformation of these boltholes the metal displaced is left integral withthe plate-section along or at the edge nearest the pipe-aperture a toform reinforcing-lugs a (see Fig. 2,) which are bent over and upon oneface of the plate member A and extend part way toward saidpipe-aperture, as shown in Fig. 3.

B represents the flange member of the clamping-ring, also made ofwrought iron or steel, and which has an annular portion disposedsubstantially perpendicularly to the plate member and of a diametergreater than that of pipe-aperture a and has its inner end (or the endadjacent to the plate member) bent or curved inwardly to form an annularflange b, parallel with the plate member, the inner edge of said flangeb forming a pipe-aperture Z), registering with the pipe-a erture a ofthe plate member. The flange b orms the bottom of an annularpacking-recess (indicated at 6 for the reception of a packing-ring ofrubber or other suitable material. The flange member B is preferablymade separately from the plate member A, as shown in the drawings, andis forced into engagement with the plate member (preferably while thelatter is in a highly-heated condition) with such force as to cause itto seat itself or embed itself in the reinforcing-lugs 0.", as shown inFig. 4, (so that said lugs are partially flattened and caused to exactlyconform to the l I exterior of the flange member,) and until theflange 1) thereof is brought into contact with the plate member, thepipe-apertures of the two members being in registration. The eflect ofthis construction is that the flange b reinforces the plate member, andvice versa, and the flattened lugs reinforce both the plate member andthe flange member and rovide a solid wall of metal at the inner side ofeach bolt-hole from the plate member .to the flange member, thus makinga very strong construction. It will be noted that the lugs a support thecurved portions of the flange member between the perpendicular portionsthereof and thoroughly reinforce the packing-recess adjacent to theboltholes, where the pressure is applied when the ring is employed in apipe-coupling.

in some instances I find it convenient to permanently unite the twomembers A and B by welding the flange b to the adjacent portions of theplate member and also to the lugs a if desired, or by brazing, ifpreferred. In some cases also I may form the flange member integral withthe plate member, as illustrated in Figs. 6 to 10, inclusive. In thesefigures, Fig. 6 shows a blank which can be conveniently employed formaking my improved clamping-ring integral and which consists of a flatplate, round or polygonal, provided with a central aperture. The plateis first operated upon to bend up the inner marginal portions to form aflange member B, extending from the inner edge of the flat portion orplate member A, the outer edge of which is preferably (although notnecessarily) bent up to form a reinforcing-flange a. The plate member Ais also provided with the bolt-holes a by punching up the lugs a atsuitable intervals, leaving said lugs connected to the plate member A attheir inner edges, all as shown in Fig. 7. The reinforcing-lugs a arethen bent down upon the plate member A, as shown in Fig. 8, and theflange member B is then expanded at its outer end, as shown in Fig. 9,to a greater diameter than the portion which is connected with the platemember at the bend which forms the pipe-aperture a". The intermediateportions b of the flange member are then expanded in an outward curveand are seated upon the reinforcing-lugs 0., which are thereby partiallyflattened. The part b of the flange member B adjacent to thepipe-aperture is simultaneously forced into contact with the platemember A around said pipe-opening and the annular packingrecess 12 isformed, as clearly shown in Fig. 10. The ring so produced andillustrated in Fig. 10 is substantially identical in construction as thering shown in Figs. 1 to 5, inclusive, except that the parts A and B areformed integrally and the results accomplished are the same in bothforms.

What I claim, and desire to secure by Let ters Patent, is

1. A clamping-ring for pipe-couplings comprising a plate member,disposed perpendicularly to the axis of the ring, and provided with acentral pipe-aperture, a plurality of bolt-holes located around saidaperture and separated reinforcing-lugs each located between one of saidbolt-holes, and said central aperture, and a flange member havingannular portions disposed substan tially perpendicularly to said platemember, and having at its inner end integral portions disposed parallelto and engaging a face of the plate member, around said pipe-apertureand also engaging said reinforcing-lugs, substantially as described.

2. A clamping-ring for pipe-couplings formed of wrought metal andcomprising a plate member, disposed perpendicularly to the axis of thering, and provided with a central pipe-aperture, a plurality ofbolt-holes located around said aperture, and separated reinforcing-lugsformed integrally with said plate each located between one of saidboltholes and the pipe-aperture and connected to the plate member at theedge of the bolt-.

hole, and a flange member having annular portions of greater diameterthan the pipeaperture disposed substantially perpendicularly to saidplate member and having at its inner end inwardly-extending integralportions, forming an annular reinforcing-flange, having portionsengaging a face of the plate member adjacent to said pipe-aperture andportions engaging said reinforcing-lugs, sub stantially as described.

3. A clamping-ring for pipe-couplings formed of wrought metal andcomprising a plate member disposed perpendicularly to the axis of thering and provided with a central pipe-aperture, bolt-holes located atintervals around the said aperture, and reinforcing-lugs, integral withthe said plate member, lying upon one face of said plate member, betweenthe bolt-holes and the pipeaperture and connected with the plate memberadjacent to the edges of said bolt-hole and a flange member having anannular portion disposed substantially perpendicularly to the platemember, and aninwardly-extending annular flange at its inner endengaging said platemember, and also engaging said lugs, the portions ofsaid lugs engaging said said aperture and a reinforcing-lug locatedbetween each bolt-hole and the pipe-aperture, connected integrally withthe plate at the edge of the b0lt-hole, and a separate flange memberhaving an annular portion substantially perpendicular to said platemember, and having its inner end provided with an inwardly-extendingflange portion engaging said plate member adjacent to said pipe-apertureand embedded in said rein- 1o forcing-lugs, substantially as described.

In testimony whereof I afiix my signature in the presence of twowitnesses.

JAMES CLARK.

Witnesses:

J. A. DUNN, M. L. WILLIS.

